Add a driver for the "snps,dw-apb-uart" used in socfpga and others.
This driver is required to get OF_PLATDATA to work for socfpga.
It uses the ns16550 driver, converting the platdata from of-platdata
go the ns16550 format.
Signed-off-by: Simon Goldschmidt <simon.k.r.goldschm...@gmail.com>
---
drivers/serial/Kconfig | 10 ++++++++
drivers/serial/Makefile | 1 +
drivers/serial/serial_dw_apb.c | 42 ++++++++++++++++++++++++++++++++++
3 files changed, 53 insertions(+)
create mode 100644 drivers/serial/serial_dw_apb.c
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index b7ff2960ab..10addd3309 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -511,6 +511,16 @@ config BCM283X_PL011_SERIAL
that supports automatic disable, so that it only gets used when
the UART is actually muxed.
+config DESIGNWARE_SERIAL
+ bool "DesignWare UART support"
+ depends on DM_SERIAL && SPL_OF_PLATDATA
+ help
+ Select this to enable a UART driver for "snps,dw-apb-uart" devices
+ when using CONFIG_SPL_OF_PLATDATA (i.e. a compiled-in device tree
+ replacement).
+ This uses the ns16550 driver, converting the platdata from of-platdata
+ to the ns16550 format.
+
config BCM6345_SERIAL
bool "Support for BCM6345 UART"
depends on DM_SERIAL
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index 06ee30697d..f1ebb90d92 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -46,6 +46,7 @@ obj-$(CONFIG_MESON_SERIAL) += serial_meson.o
obj-$(CONFIG_INTEL_MID_SERIAL) += serial_intel_mid.o
ifdef CONFIG_SPL_BUILD
obj-$(CONFIG_ROCKCHIP_SERIAL) += serial_rockchip.o
+obj-$(CONFIG_DESIGNWARE_SERIAL) += serial_dw_apb.o
endif
obj-$(CONFIG_XILINX_UARTLITE) += serial_xuartlite.o
obj-$(CONFIG_SANDBOX_SERIAL) += sandbox.o
diff --git a/drivers/serial/serial_dw_apb.c b/drivers/serial/serial_dw_apb.c
new file mode 100644
index 0000000000..26580e5ba5
--- /dev/null
+++ b/drivers/serial/serial_dw_apb.c
@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2018 Simon Goldschmidt
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dt-structs.h>
+#include <ns16550.h>
+#include <serial.h>
+
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+struct dw_apb_uart_platdata {
+ struct dtd_snps_dw_apb_uart dtplat;
+ struct ns16550_platdata plat;
+};
+
+static int dw_apb_serial_probe(struct udevice *dev)
+{
+ struct dw_apb_uart_platdata *plat = dev_get_platdata(dev);
+
+ /* Set up correct platform data for the standard driver */
+ plat->plat.base = plat->dtplat.reg[0];
+ plat->plat.reg_shift = plat->dtplat.reg_shift;
+ plat->plat.reg_width = plat->dtplat.reg_io_width;
+ plat->plat.clock = plat->dtplat.clock_frequency;
+ plat->plat.fcr = UART_FCR_DEFVAL;
+ dev->platdata = &plat->plat;
+
+ return ns16550_serial_probe(dev);
+}
+
+U_BOOT_DRIVER(snps_dw_apb_uart) = {
+ .name = "snps_dw_apb_uart",
+ .id = UCLASS_SERIAL,
+ .priv_auto_alloc_size = sizeof(struct NS16550),
+ .platdata_auto_alloc_size = sizeof(struct dw_apb_uart_platdata),
+ .probe = dw_apb_serial_probe,
+ .ops = &ns16550_serial_ops,
+ .flags = DM_FLAG_PRE_RELOC,
+};
+#endif
--
2.17.1
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